||New WFC3 UVIS bad pixel tables that include flags value 32 for pixel instability, as described by WFC3 ISR 2018.15. This is for the month of January 2020.
||These WFC3 UVIS superbiases, _bia.fits, will affect all UVIS data taken from January 1 2019 to present. Currently, the automated calibration pipeline and Calibration Reference Data System only have WFC3 UVIS superbias reference files up to a USEAFTER date of January 1 2018. The automated pipeline should now use these reference files to perform bias subtraction on any UVIS datasets obtained after January 1 2019 because they represent the most accurate estimate of the bias level at the time of the observation. These WFC3 UVIS bias files were generated using bias exposures from the HST Cycle 26 daily monitoring program 15567 and Cycle 27 program 15712. More information regarding the datasets used to create these reference files can be found in history section of the header. Information on the methods used to generate these files can be found in WFC3 ISR 2019 11.
||These files were generated following the ACS WFC anneal on Feb 03, 2020, and should be used to calibrate ACS WFC observations taken between Jan 09, 2020 and Feb 03, 2020.
||This WFC3 UVIS superdark, drk, will affect all UVIS data taken from after November 27th up to November 30th 2019. Currently, the automated calibration pipeline and Calibration Reference Data System is missing this file due to a mistake in the original delivery. The automated pipeline should now use this reference files to perform dark subtraction on any UVIS datasets obtained between the dates listed above because it represent the most accurate estimate of the dark current and hot pixels at the time of the science observation. This WFC3 UVIS drk files was generated using dark exposures from the HST Cycle 27 daily monitoring program 15714. More information regarding the method used to create UVIS dark calibration reference files can be found in WFC3 ISR 2016 08. Additionally, the header of each reference file has a detailed history section outlining the process and provides a list of datasets used to create each file.